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首页> 外文期刊>Journal of Earthquake Engineering >Seismic Performance Assessment of Steel Frames with Shape Memory Alloy Connections, Part II -Probabilistic Seismic Demand Assessment
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Seismic Performance Assessment of Steel Frames with Shape Memory Alloy Connections, Part II -Probabilistic Seismic Demand Assessment

机译：具有形状记忆合金连接的钢框架的抗震性能评估，第二部分-概率抗震需求评估

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摘要

This article is the second of two companion articles that evaluate the seismic performance of steel moment-resisting frames with innovative beam-to-column connections that incorporate shape memory alloy (SMA) elements to enhance the energy dissipation characteristics of such frames. Building upon the finite element models of the three- and nine-story frames that were developed in the first article, the seismic demands on partially restrained frames with and without SMA elements are evaluated within a probabilistic framework. The results of this evaluation, expressed in the form of demand hazard curves, depict the effectiveness of the SMA connections in enhancing building performance over a range of demand levels. Martensitic SMA connections are most effective in controlling deformation demands on the frame from high levels of seismic intensity. In contrast, the recentering capability of superelastic SMA connections make them most suitable for reducing residual deformations in the structure, a reduction that is achieved at the expense of increased deformation demands during strong excitation. However, neither connection is uniformly beneficial at all hazard levels, suggesting that SMA systems must be tailored to the specific performance objectives for the building structural system.
机译：本文是两篇附带的文章中的第二篇，该文章通过创新的梁到柱连接评估了钢矩抗力框架的抗震性能，这些梁与柱的连接采用了形状记忆合金（SMA）元素来增强此类框架的能量耗散特性。在第一篇文章中开发的三层和九层框架的有限元模型的基础上，在概率框架内评估了具有和不具有SMA元素的部分约束框架的抗震要求。评估结果以需求危害曲线的形式表示，描述了SMA连接在一系列需求水平上增强建筑性能的有效性。马氏体SMA连接最有效地控制来自高水平地震烈度的车架变形需求。相比之下，超弹性SMA连接的集中能力使其最适合减少结构中的残余变形，这种降低是以强激励期间变形需求增加为代价的。但是，这两种连接方式在所有危害等级上均没有统一的好处，这表明SMA系统必须针对建筑结构系统的特定性能目标进行定制。

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